Core-making machine



0. SKEPP STEDT. CORE MAKiNG MACHINE.

APPLlCATlON FILED sm. 13. 1920.

Patented May 30, 1922.

UNITED stares CORE-MAKING- MACHINE.

To all whom it may concern:

Be it known that I, 01.01 Sxnrrsrnnr, a citizen of the United States, residing at Mol-ine, in the county of-Rocklsland and State of Illinois, have invented certainnew and useful Improvements in Core-Making Machines, of which the following is a specification,

My invention relates to core making machines, and has for its purpose to impart a vibratory movement to the core box, in order to thoroughly loosen the cores, to permit the removal of the box therefrom. This has usually been done by hand, with the expenditure of considerable time, and not always with satisfactory results, as the operation, when performed by hand, is not always uniform.

The chief purpose of the present invention is to provide a machine by which the work of separating the cores from the box can be quickly and uniformly'performed, so that all parts of theflcore box will receive the same amount of agitation. It isa lso constructedand arranged so that the vibratory action will be produced by placing the core- The machine is also capable of adjust ,ment, so as to increase or decrease the v1-.

bratory action, as desired, so that it will conform to the various sizes and weights of core-boxes to be operated upon thereby.

In the drawings:

Fig. 1 is a plan view of the invention.

Fig. 2 is a front elevation thereof. 7

Fig. 3 is a vertical cross-section on the broken line 3-3 of Fig.1. I

Fig. 4 is a detail of the lower part of the trip arm 14.

1 represents a table or bed-plate, which may be supported as shown on legs 2, or in any other suitable manner. At one end of the table is a pair of supports 8 curved upwardly toward the front of the table, and provided at their upper ends with clampsockets'4,thejaws of which are adapted to; be compressed by means of screws 5, provided at one end with handles 5*, by means of which they are operated.

Vertically supported in the sockets 4 are bars 6, to a central part, of which are at-' tached clamps 7 provided with clamping and the'arm 14 are held PATENT. OFF CE.

' Specification of Letters Patent": Pat t Application filed September1'3, 1920. Seria1 N0.'409,985. i i i I screws 8. The clamps .7 are unitedby a I cross-bar 9, secured to which is an air-actuated vibratory member10, which maybe of any approved construction, and which'is connected with a source of air supply means of a flexible tube 11 and termediate said tube and pipe is a valve chamber 13, containing a valve which nor mally closes the inlet of air Midway between the bars 6 is a trip arm 14, having afoot 15 slidable in ajplate 16 in the table 1. v a plunger 17, passing through a guide-block 18 on the table 1, and operatively connected with the valve in the chamber 13,;so as to open said valve upon the arm 14 being moved mthe direction thereof. By means pipe 12., In:

from the pipe 12. i

Connected with saidfoot is i I of a coiled'spring 19 on the plun er 17 be tweenthe foot 15 and guide. 18 suc h plunger normally in an in operative position. i

A core box is represented in broken lines at 20, such core-box being supported on'the table 1 in proximity to the bars 6 and; arm 14. By moving said box toward the rear .of

the table the arm 14 is forced rearwardly,

permitting passage of the air to the vibrator 10, and imparting a'vibratory action to the bars 6. The rearward movement of the core-box brings into contact with, said bars, whereupon the box is givenawcorre" spending vibration, loosening the cores without injury thereto. The box, whichflis in an inverted position for this operation can then be easily removed from the cores. A

more even vibration is obtained in this way than by the usual process.

As soon as the box has been sufiiciently agitated it is moved away fromthe bars 6, the arm 14 returning to its former position, and the vibratory action ceasing. It "will be seen that the action of the machine is entirely automatic, the placing of the box in posltion for'the operation of the bars 6 starting the vibratory movement of 'I such The bars 6 are capable of vertical adjustment in the sockets 4, for the purpose of increasing or diminishing the intensity of the vibrations, as maybe desired, and asimilar result maybe produced ibyadjustment of the clamps 7 upwardly or .down- I wardly on the bars 6. When a large corebox is in position in the machine, a greater amount of VlbI'ELtOIYflCtlOIl is required than for one that is comparatively smaller. The arm 14: is of suflicient height to insure its operation by a box of any ordinary size.

While the device has been herein shown and set forth as being specially adapted for use with core-boxes, it is not limited to such use,ibut.canbe adapted for other operations, such as in connection with the match plate of a foundry flask. In this use one of the bars 6 would be sufficient to perform the Work.

What I claim and desire to secure by Letters Patent, is:

,1. A device of the class described, comprising a table; a pair of vibratory members supported above the same; vibratory devices adapted to impart movement to said vibratory members;-and a trip-arm movable on said table, operatively connected with said vibratory devices, and adapted to be actuated by a core-box when in position on v a said table.

2 A device of the class described, comprising a table; a bar supported thereon so as to be capable of vibratory movement; vibratory devices operatively connected with said bar; and a trip member, movably ,mounted on said table, operatively con parting vibration thereto; and a trip arm,

be actuated by a core-box positioned on said table.

4:. A device of the class described, comprising a table adapted for the support of a core-box; a pair of supports mountedon said table and provided with clamping, devices at their upper ends; bars secured in said clamping devices so as to be capable of adjustment therein; vibratory devices operatively connected with said bars; and a trip-arm supported on said table, operatively connected with said vibratory devices, and adapted to be actuated by'a core box positioned on said table.

5. A device of the class described, comprising a table adapted for the support of an object to be vibrated; a pair of supports mounted on said table; bars held in said supports so as to be capable of being held in adjusted positions therein; a cross-bar uniting said bars so as to be capable of adjustment longitudinally thereof; a vibrator secured to said cross-bar; vibratory devices operatively connected with said vibrator, normally out of action; a trip arm slidably supported on said table and operatively connected with said vibratory devices; and

means for holding said trip arm yieldably in an inoperative position. I

6. A device of the class described, comprising a table; a core-box movably supported on said table; vibratory devices normally inoperative, rigidly supported on said table, and means, whereby a limited lateral movement of said boX willcause said vibratory devices to operate In testimony whereof I OLOF SKEPPSTEDT.

affix my signature. I 

